{"product_id":"689-44316-a0-water-pump-impeller-gasket-for-yamaha-mariner-jlm-marine","title":"689-44316-A0 Water Pump Impeller Gasket for Yamaha Mariner | JLM Marine","description":"\u003ch2\u003eWater Pump Impeller Gasket – Fits Yamaha \u0026amp; Mariner 20–30 HP Outboards\u003c\/h2\u003e\n\n\u003cp\u003eThis water pump impeller gasket is engineered for Yamaha and Mariner 2-stroke outboard engines rated 20–30 HP. It ensures a reliable seal between impeller housing components, preventing water leaks and maintaining optimal cooling system performance across a range of models from the mid-1980s.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDirect Replacement for:\u003c\/strong\u003e Yamaha 689-44316-A0\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eCompatible with Yamaha 2-stroke 25–30 HP (1984–1985) and Mariner 20–30 HP (various series)\u003c\/li\u003e\n  \u003cli\u003ePrecise OEM-specification fitment for impeller housing assembly\u003c\/li\u003e\n  \u003cli\u003eEssential component for water pump maintenance and rebuild\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003ePart Number Cross-Reference\u003c\/h2\u003e\n\n\u003cp\u003eUse this table to confirm equivalent part numbers across OEM and aftermarket brands.\u003c\/p\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eBrand\u003c\/th\u003e\n      \u003cth\u003ePart Number\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eYamaha\u003c\/td\u003e\n      \u003ctd\u003e689-44316-A0\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eCompatible Engine Models\u003c\/h2\u003e\n\n\u003cp\u003eConfirm your engine model\/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial\/model: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-serial-number-guide-2025\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Serial Number Guide\u003c\/a\u003e. You can also review exploded diagrams to verify part numbers: \u003ca href=\"https:\/\/jlmmarine.com\/blogs\/serial-number-guide\/yamaha-outboard-parts-diagrams-catalog\" rel=\"nofollow noopener\" target=\"_blank\"\u003eYamaha Parts Diagrams \u0026amp; Catalog\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003cdiv style=\"overflow-x:auto;\"\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n    \u003cthead\u003e\n      \u003ctr\u003e\n        \u003cth\u003eBrand\u003c\/th\u003e\n        \u003cth\u003eModel\u003c\/th\u003e\n        \u003cth\u003eRated HP\u003c\/th\u003e\n        \u003cth\u003eStroke\u003c\/th\u003e\n        \u003cth\u003eYears\u003c\/th\u003e\n        \u003cth\u003eNotes\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eOutboard\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1985\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eYamaha\u003c\/td\u003e\n        \u003ctd\u003eOutboard\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e2-Stroke\u003c\/td\u003e\n        \u003ctd\u003e1984–1985\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e20C\u003c\/td\u003e\n        \u003ctd\u003e20 HP\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003eS\/N prefix 6A9\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e25C\u003c\/td\u003e\n        \u003ctd\u003e25 HP\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003eS\/N prefix 6A9\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003ctd\u003eMariner\u003c\/td\u003e\n        \u003ctd\u003e30A\u003c\/td\u003e\n        \u003ctd\u003e30 HP\u003c\/td\u003e\n        \u003ctd\u003e\u003c\/td\u003e\n        \u003ctd\u003eAll Years\u003c\/td\u003e\n        \u003ctd\u003eS\/N prefix 684\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n\u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\"\u003e\n  \u003cthead\u003e\n    \u003ctr\u003e\n      \u003cth\u003eSpecification\u003c\/th\u003e\n      \u003cth\u003eValue\u003c\/th\u003e\n    \u003c\/tr\u003e\n  \u003c\/thead\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eOEM Part Number\u003c\/td\u003e\n      \u003ctd\u003e689-44316-A0\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eApplication\u003c\/td\u003e\n      \u003ctd\u003eWater Pump Impeller Housing Gasket\u003c\/td\u003e\n    \u003c\/tr\u003e\n    \u003ctr\u003e\n      \u003ctd\u003eFitment\u003c\/td\u003e\n      \u003ctd\u003eYamaha 20–30 HP, Mariner 20–30 HP\u003c\/td\u003e\n    \u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\u003cspan style=\"color:red;\"\u003e1 × Impeller Gasket (Yamaha 689-44316-A0-00)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eInstallation Guide\u003c\/h2\u003e\n\n\u003col\u003e\n  \u003cli\u003eDisconnect the fuel line and remove the engine cowling to access the lower unit.\u003c\/li\u003e\n  \u003cli\u003eDrain the lower unit gear oil completely and disconnect the water intake hose if necessary.\u003c\/li\u003e\n  \u003cli\u003eRemove the water pump housing bolts and carefully separate the housing from the lower unit. Note the orientation of all components.\u003c\/li\u003e\n  \u003cli\u003eRemove the old impeller gasket and clean both mating surfaces thoroughly to remove residue, corrosion, or debris.\u003c\/li\u003e\n  \u003cli\u003eInspect the impeller housing and plate for cracks or wear; replace any damaged components before reassembly.\u003c\/li\u003e\n  \u003cli\u003ePosition the new gasket onto the lower housing, ensuring all bolt holes and water passages align correctly.\u003c\/li\u003e\n  \u003cli\u003eReinstall the impeller (if removed) with proper lubrication, ensuring blades are oriented in the correct rotation direction.\u003c\/li\u003e\n  \u003cli\u003eCarefully seat the water pump housing onto the gasket, aligning dowel pins and bolt holes without shifting the gasket.\u003c\/li\u003e\n  \u003cli\u003eInstall housing bolts hand-tight in a crisscross pattern, then torque to manufacturer specifications (typically 7–10 ft-lbs).\u003c\/li\u003e\n  \u003cli\u003eReconnect all water hoses, refill the lower unit with the correct grade and quantity of gear oil, and check for leaks.\u003c\/li\u003e\n  \u003cli\u003eReinstall the engine cowling and reconnect the fuel line. Start the engine and verify strong water flow from the tell-tale outlet.\u003c\/li\u003e\n  \u003cli\u003eRun the engine at idle for several minutes and inspect the pump area for any signs of water leakage or abnormal operation.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How do I confirm this gasket fits my Yamaha or Mariner outboard?\u003c\/strong\u003e\u003cbr\u003e\nA: Cross-reference your engine's model, horsepower, year, and serial number prefix with the compatibility table above. Verify that your original gasket matches the OEM part number 689-44316-A0.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How often should I replace the impeller gasket?\u003c\/strong\u003e\u003cbr\u003e\nA: Replace the gasket every time you service or replace the water pump impeller—typically every 2–3 years or 200–300 hours of operation. Reusing old gaskets can cause leaks and cooling system failure.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What are the signs that my water pump gasket is failing?\u003c\/strong\u003e\u003cbr\u003e\nA: Symptoms include reduced or no water flow from the tell-tale, engine overheating, visible water leaks around the pump housing, or moisture in the lower unit. Inspect and replace the gasket immediately if any of these occur.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Can I reuse the old gasket if it looks intact?\u003c\/strong\u003e\u003cbr\u003e\nA: No. Gaskets compress and conform to mating surfaces during initial installation and will not seal properly when reused. Always install a new gasket during water pump service.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: Is this an OEM or aftermarket part?\u003c\/strong\u003e\u003cbr\u003e\nA: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: How fast do you ship and how much does it cost?\u003c\/strong\u003e\u003cbr\u003e\nA: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eQ: What is your warranty and return policy?\u003c\/strong\u003e\u003cbr\u003e\nA: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused \u0026amp; in original condition); please see our policy page or reach out for instructions.\u003c\/p\u003e\n\n\u003ch2\u003eImportant Notes\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003eVerify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.\u003c\/li\u003e\n  \u003cli\u003eThis product is an aftermarket replacement part and is not an OEM component.\u003c\/li\u003e\n  \u003cli\u003eProfessional installation is recommended to ensure safety and optimal performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhy Choose JLM MARINE?\u003c\/h2\u003e\n\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuality Assured:\u003c\/strong\u003e As a trusted manufacturer for over 20 years, we supply top marine brands globally.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFast Global Shipping:\u003c\/strong\u003e Free delivery worldwide in 5–15 days.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDirect from Manufacturer:\u003c\/strong\u003e Competitive pricing without compromising quality.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"JLM Marine","offers":[{"title":"Default Title","offer_id":51960672944441,"sku":"2008","price":12.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0885\/0433\/6697\/files\/12_1dd8d210-08ed-4941-b513-289729ea46f1.jpg?v=1771677679","url":"https:\/\/jlmmarine.com\/products\/689-44316-a0-water-pump-impeller-gasket-for-yamaha-mariner-jlm-marine","provider":"JLM Marine Boat Parts Limited","version":"1.0","type":"link"}